The I/O operators: <<
and >> work generically
on all Fusion sequences. The global operator<< has been overloaded for generic
output streams such that Sequence(s)
are output by recursively calling operator<< for each element. Analogously,
the global operator>>
has been overloaded to extract Sequence(s)
from generic input streams by recursively calling operator>> for each element.

The default delimiter between the elements is space, and the Sequence
is enclosed in parenthesis. For Example: